linux.git/Documentation/devicetree/bindings/serial, branch v5.14

Merge tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2021-07-05T21:08:24+00:00

Pull tty / serial updates from Greg KH:
 "Here is the big set of tty and serial driver patches for 5.14-rc1.

  A bit more than normal, but nothing major, lots of cleanups.
  Highlights are:

   - lots of tty api cleanups and mxser driver cleanups from Jiri

   - build warning fixes

   - various serial driver updates

   - coding style cleanups

   - various tty driver minor fixes and updates

   - removal of broken and disable r3964 line discipline (finally!)

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (227 commits)
  serial: mvebu-uart: remove unused member nb from struct mvebu_uart
  arm64: dts: marvell: armada-37xx: Fix reg for standard variant of UART
  dt-bindings: mvebu-uart: fix documentation
  serial: mvebu-uart: correctly calculate minimal possible baudrate
  serial: mvebu-uart: do not allow changing baudrate when uartclk is not available
  serial: mvebu-uart: fix calculation of clock divisor
  tty: make linux/tty_flip.h self-contained
  serial: Prefer unsigned int to bare use of unsigned
  serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs
  serial: qcom_geni_serial: use DT aliases according to DT bindings
  Revert "tty: serial: Add UART driver for Cortina-Access platform"
  tty: serial: Add UART driver for Cortina-Access platform
  MAINTAINERS: add me back as mxser maintainer
  mxser: Documentation, fix typos
  mxser: Documentation, make the docs up-to-date
  mxser: Documentation, remove traces of callout device
  mxser: introduce mxser_16550A_or_MUST helper
  mxser: rename flags to old_speed in mxser_set_serial_info
  mxser: use port variable in mxser_set_serial_info
  mxser: access info->MCR under info->slock
  ...

dt-bindings: mvebu-uart: fix documentation

2021-06-25T11:53:38+00:00

Both UARTs support higher baudrates and are not limited to baudrate 230400.
Only current kernel driver implementation has limitation for both UARTs in
maximal baudrate 230400. This limitation will be removed in next patches.
So remove incorrect information about (hardware) limitation from bindings.

UART1 (standard variant with DT node name 'uart0') has register space
0x12000-0x12018 and not whole size 0x200. So fix also this in example.

Signed-off-by: Pali Rohár 
Fixes: d160c3413478 ("dt-bindings: mvebu-uart: update documentation with extended UART")
Link: https://lore.kernel.org/r/20210624224909.6350-5-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman

dt-bindings: Drop redundant minItems/maxItems

2021-06-21T19:56:46+00:00

If a property has an 'items' list, then a 'minItems' or 'maxItems' with the
same size as the list is redundant and can be dropped. Note that is DT
schema specific behavior and not standard json-schema behavior. The tooling
will fixup the final schema adding any unspecified minItems/maxItems.

This condition is partially checked with the meta-schema already, but
only if both 'minItems' and 'maxItems' are equal to the 'items' length.
An improved meta-schema is pending.

Cc: Jens Axboe 
Cc: Stephen Boyd 
Cc: Herbert Xu 
Cc: "David S. Miller" 
Cc: David Airlie 
Cc: Daniel Vetter 
Cc: Bartosz Golaszewski 
Cc: Kamal Dasu 
Cc: Lars-Peter Clausen 
Cc: Thomas Gleixner 
Cc: Marc Zyngier 
Cc: Joerg Roedel 
Cc: Mauro Carvalho Chehab 
Cc: Krzysztof Kozlowski 
Cc: Jakub Kicinski 
Cc: Wolfgang Grandegger 
Cc: Andrew Lunn 
Cc: Vivien Didelot 
Cc: Vladimir Oltean 
Cc: Bjorn Helgaas 
Cc: Kishon Vijay Abraham I 
Cc: Linus Walleij 
Cc: "Uwe Kleine-König" 
Cc: Lee Jones 
Cc: Ohad Ben-Cohen 
Cc: Mathieu Poirier 
Cc: Paul Walmsley 
Cc: Palmer Dabbelt 
Cc: Albert Ou 
Cc: Alessandro Zummo 
Cc: Alexandre Belloni 
Cc: Zhang Rui 
Cc: Daniel Lezcano 
Cc: Wim Van Sebroeck 
Cc: Guenter Roeck 
Signed-off-by: Rob Herring 
Acked-by: Marc Kleine-Budde 
Acked-by: Ulf Hansson  # for MMC
Acked-by: Jassi Brar 
Acked-By: Vinod Koul 
Reviewed-by: Greg Kroah-Hartman 
Reviewed-by: Arnaud Pouliquen 
Acked-by: Mark Brown 
Acked-by: Philipp Zabel 
Acked-by: Wolfram Sang  # for I2C
Acked-by: Jonathan Cameron 
Link: https://lore.kernel.org/r/20210615191543.1043414-1-robh@kernel.org

dt-bindings: serial: Move omap-serial.txt to YAML schema

2021-06-16T07:20:29+00:00

Convert serial-omap.txt to YAML schema for better checks and documentation.

Acked-by: Tony Lindgren 
Signed-off-by: Vignesh Raghavendra 
Link: https://lore.kernel.org/r/20210610182227.2480-1-vigneshr@ti.com
Signed-off-by: Greg Kroah-Hartman

serial: imx: Add DMA buffer configuration via DT

2021-06-04T13:11:16+00:00

In order to optimize serial communication (performance/throughput VS
latency), we may need to tweak DMA period number and size. This adds
DT properties to configure those values before initialising DMA.
The defaults will stay the same as before.

[update documentation and commit message, rebase to current master,
switch back to DT instead of sysfs]

Signed-off-by: Fabien Lahoudere 
Signed-off-by: Sebastian Reichel 
Link: https://lore.kernel.org/r/20210430175038.103226-2-sebastian.reichel@collabora.com
Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: pl011: Delete an incorrect compatible string

2021-05-27T13:18:52+00:00

The compatible strings "zte,zx296702-uart" and "arm,primecell" are a
combination, but commit 89d4f98ae90d ("ARM: remove zte zx platform")
removes only the former. It is incorrect to match driver pl011 based only
on the remaining "arm,primecell". Delete it.

Signed-off-by: Zhen Lei 
Reviewed-by: Rob Herring 

 Documentation/devicetree/bindings/serial/pl011.yaml | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

Link: https://lore.kernel.org/r/20210520115440.8259-2-thunder.leizhen@huawei.com
Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: snps-dw-apb-uart: Add Rockchip RK1808

2021-05-20T14:22:47+00:00

Add a Rockchip RK1808 compatible.

Signed-off-by: Andreas Färber 
Acked-by: Rob Herring 
Link: https://lore.kernel.org/r/20210516230551.12469-3-afaerber@suse.de
Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: renesas,scif: Document r9a07g044 bindings

2021-05-20T14:21:24+00:00

Document R9A07G044 SoC variants, common compatiable string
"renesas,scif-r9a07g044" is added for RZ/G2L and RZ/G2LC SoC.

Signed-off-by: Lad Prabhakar 
Reviewed-by: Biju Das 
Acked-by: Rob Herring 
Link: https://lore.kernel.org/r/20210514192218.13022-10-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: amlogic, meson-uart: add fifo-size property

2021-05-20T14:10:59+00:00

On most of the Amlogic SoCs, the first UART controller in the "Everything-Else"
power domain has 128bytes of RX & TX FIFO, so add an optional property to describe
a different FIFO size from the other ports (64bytes).

Reviewed-by: Martin Blumenstingl 
Reviewed-by: Rob Herring 
Signed-off-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20210518075833.3736038-2-narmstrong@baylibre.com
Signed-off-by: Greg Kroah-Hartman

dt-bindings: serial: Add label property in serial.yaml

2021-05-13T14:19:49+00:00

When there is more than one serial port present, the property 'label'
allows a custom name to be used for briefly describe the usage or position
of each serial port.

Without this "label" property, many dtbs_check warnings similar to the
following are reported:
arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dt.yaml: \
serial@ffd74000: Additional properties are not allowed ('label' was unexpected)
        From schema: Documentation/devicetree/bindings/serial/pl011.yaml

Reviewed-by: Rob Herring 
Signed-off-by: Zhen Lei 
Link: https://lore.kernel.org/r/20210506132049.1513-3-thunder.leizhen@huawei.com
Signed-off-by: Greg Kroah-Hartman